Injectors SUBARU LEGACY 1997 Service Repair Manual
[x] Cancel search | Manufacturer: SUBARU, Model Year: 1997, Model line: LEGACY, Model: SUBARU LEGACY 1997Pages: 3342, PDF Size: 62.95 MB
Page 249 of 3342
4. Engine Compression
A: MEASUREMENT
1. 2200 cc MODEL
1) After warming-up the engine, turn ignition switch to
OFF.
2) Make sure that the battery is fully charged.
3) Remove all the spark plugs.
4) Disconnect connectors from fuel injectors.
5) Fully open throttle valve.
6) Check the starter motor for satisfactory performance
and operation.
G2M0098
7) Hold the compression gauge tight against the spark
plug hole.
CAUTION:
When using a screw-in type compression gauge, the
screw (put into cylinder head spark plug hole) should
be less than 18 mm (0.71 in) long.
8) Crank the engine by means of the starter motor, and
read the maximum value on the gauge when the pointer is
steady.
9) Perform at least two measurements per cylinder, and
make sure that the values are correct.
Compression (200—300 rpm and fully open throttle):
Standard
1,079—1,275 kPa
(11.0—13.0 kg/cm
2, 156—185 psi)
Limit
883 kPa (9.0 kg/cm
2, 128 psi)
Difference between cylinders
196 kPa (2.0 kg/cm
2, 28 psi)
2. 2500 cc MODEL
CAUTION:
After warming-up, engine becomes very hot. Be care-
ful not to burn yourself during measurement.
1) After warming-up the engine, turn ignition switch to
OFF.
2) Make sure that the battery is fully charged.
3) Remove all the spark plugs.
4) Disconnect connectors from fuel injectors.
4
2-2
4. Engine Compression
Page 485 of 3342
B2M0347A
2) Disconnect connectors from throttle position sensor,
ignition coil, fuel injectors, idle air control solenoid valve,
purge control solenoid valve and EGR solenoid valve.
3) Remove engine harness from intake manifold.
1EGR solenoid valve
2Throttle position sensor
3Idle air control solenoid valve
4Purge control solenoid valve
5Harness band
H2M1247
4) Remove idle air control solenoid valve from intake
manifold.
B2M0157
5) Remove throttle body from intake manifold.
B2M0161B
6) Remove fuel pipes, etc. from intake manifold.
1Pressure regulator
2Fuel pipe ASSY
7) Remove EGR solenoid valve and purge control sole-
noid valve.
B2M0161B
C: ASSEMBLY
1) Install EGR solenoid valve and purge control solenoid
valve.
2) Assemble fuel pipes, etc. to intake manifold.
1Pressure regulator
2Fuel pipe ASSY
16
2-7SERVICE PROCEDURE
4. Intake Manifold
Page 486 of 3342
B2M0157
3) Assemble throttle body to intake manifold.
CAUTION:
Replace gasket with a new one.
Tightening torque:
22±2 N⋅m (2.2±0.2 kg-m, 15.9±1.4 ft-lb)
H2M1247
4) Install idle air control solenoid valve to intake manifold.
CAUTION:
Replace gasket with a new one.
Tightening torque:
6.4±0.5 N⋅m (0.65±0.05 kg-m, 4.7±0.4 ft-lb)
B2M0347A
5) Install engine harness onto intake manifold.
6) Connect connectors to throttle position sensor, ignition
coil, fuel injectors, idle air control solenoid valve, purge
control solenoid valve and EGR solenoid valve.
1EGR solenoid valve
2Throttle position sensor
3Idle air control solenoid valve
4Purge control solenoid valve
5Harness band
B2M0757A
7) Connect engine ground terminal to intake manifold.
B2M0159
D: INSTALLATION
1) Install intake manifold onto cylinder heads.
CAUTION:
Always use new gaskets.
Tightening torque:
25±2 N⋅m (2.5±0.2 kg-m, 18.1±1.4 ft-lb)
17
2-7SERVICE PROCEDURE
4. Intake Manifold
Page 1856 of 3342
1Engine control module (ECM)
2Ignition coil
3Ignitor
4Crankshaft position sensor
5Camshaft position sensor
6Throttle position sensor
7Fuel injectors
8Pressure regulator
9Engine coolant temperature sensor
10Mass air flow sensor
11Idle air control solenoid valve
12Purge control solenoid valve
13Fuel pump
14PCV valve
15Air cleaner
16Canister
17Main relay
18Fuel pump relay
19Fuel filter
20Front catalytic converter
21Rear catalytic converter
22EGR valve (AT vehicles only)
23EGR control solenoid valve (AT vehicles only)
24Radiator fan
25Radiator fan relay
26Pressure sources switching solenoid valve
27Knock sensor
28Back-pressure transducer (AT vehicles only)
29Front oxygen sensor
30Rear oxygen sensor (2200 cc Federal spec. vehicles)
31Pressure sensor
32A/C compressor
33Inhibitor switch
34CHECK ENGINE malfunction indicator lamp (MIL)
35Tachometer
36A/C relay
37A/C control module
38Ignition switch
39Transmission control module (TCM) (AT vehicles only)
40ABS/TCS control module (TCS equipped models)
41Vehicle speed sensor
42Data link connector (For Subaru select monitor)
43Data link connector (For Subaru select monitor and OBD-II
general scan tool)
44Two way valve
45Rear oxygen sensor (2200 cc California spec. vehicles)
46Filter
5
2-7ON-BOARD DIAGNOSTICS II SYSTEM
1. General
Page 1858 of 3342
1Engine control module (ECM)
2Ignition coil
3Ignitor
4Crankshaft position sensor
5Camshaft position sensor
6Throttle position sensor
7Fuel injectors
8Pressure regulator
9Engine coolant temperature sensor
10Mass air flow sensor
11Idle air control solenoid valve
12Purge control solenoid valve
13Fuel pump
14PCV valve
15Air cleaner
16Canister
17Main relay
18Fuel pump relay
19Fuel filter
20Front catalytic converter
21Rear catalytic converter
22EGR valve (AT vehicles only)
23EGR control solenoid valve (AT vehicles only)
24Radiator fan
25Radiator fan relay
26Pressure sources switching solenoid valve
27Front oxygen sensor
28Rear oxygen sensor (2200 cc Federal spec. vehicles)
29Pressure sensor
30A/C compressor (With A/C models)
31Inhibitor switch
32CHECK ENGINE malfunction indicator lamp (MIL)
33Tachometer
34A/C relay (With A/C models)
35A/C control module (With A/C models)
36Ignition switch
37Transmission control module (TCM)
38Vehicle speed sensor
39Data link connector (For Subaru select monitor)
40Data link connector (For Subaru select monitor and OBD-II
general scan tool)
41Rear oxygen sensor (2200 cc California spec. vehicles)
42Knock sensor
43Back-pressure transducer (AT vehicles only)
44Filter
45Fuel tank pressure sensor
46Pressure control solenoid valve
47Fuel temperature sensor
48Fuel level sensor
49Vent control solenoid valve
50Air filter
7
2-7ON-BOARD DIAGNOSTICS II SYSTEM
1. General
Page 1860 of 3342
1Engine control module (ECM)
2Ignition coil
3Ignitor
4Crankshaft position sensor
5Camshaft position sensor
6Throttle position sensor
7Fuel injectors
8Pressure regulator
9Engine coolant temperature sensor
10Mass air flow sensor
11Idle air control solenoid valve
12Purge control solenoid valve
13Fuel pump
14PCV valve
15Air cleaner
16Canister
17Main relay
18Fuel pump relay
19Fuel filter
20Front catalytic converter
21Rear catalytic converter
22EGR valve
23EGR control solenoid valve
24Radiator fan
25Radiator fan relay
26Pressure sources switching solenoid valve
27Knock sensor
28Back-pressure transducer
29Front oxygen sensor
30Rear oxygen sensor
31Pressure sensor
32A/C compressor
33Inhibitor switch
34CHECK ENGINE malfunction indicator lamp (MIL)
35Tachometer
36A/C relay
37A/C control module
38Ignition switch
39Transmission control module (TCM)
40Vehicle speed sensor
41Data link connector (Subaru select monitor)
42Data link connector (OBD-II general scan tool)
43Two way valve
44Filter
9
2-7ON-BOARD DIAGNOSTICS II SYSTEM
1. General
Page 1932 of 3342
ContentConnector
No.Terminal
No.Signal (V)
Note
Ignition SW ON
(Engine OFF)Engine ON (Idling)
AT diagnosis input signal B84 80Less than 1)More
than 4Less than 1)More
than 4Waveform
GND (sensors) B84 20 0 0—
GND (injectors) B8469
00—
95
GND (ignition system) B84 94 0 0—
GND (power supply) B8419
00—
46
GND (control systems) B8417
00—
18
GND (oxygen sensor
heater)B84 42 0 0—
2. ENGINE CONDITION DATA
Content Model Specified data
Mass air flow2200 cc1.7—3.3 (g/sec): Idling
7.1—14.2 (g/sec): 2,500 rpm racing
2500 cc2.2—4.2 (g/sec): Idling
8.6—14.5 (g/sec): 2,500 rpm racing
Engine load2200 cc1.6—2.9 (%): Idling
6.4—12.8 (%): 2,500 rpm racing
2500 cc1.9—3.5 (%): Idling
7.2—12.1 (%): 2,500 rpm racing
Measuring condition:
After warm-up the engine.
Gear position is in“N”or“P”position.
A/C is turned OFF.
All accessory switches are turned OFF.
81
2-7ON-BOARD DIAGNOSTICS II SYSTEM
5. Specified Data
Page 2067 of 3342
10AI5
ONLY ONE CYLINDER
: Is there a fault in that cylinder?
NOTE:
Check the following items.
Spark plug
Spark plug cord
Fuel injector
Compression ratio
: Repair or replace faulty parts.
: Go to step10AI11.
10AI6
GROUP OF #1 AND #2 CYLINDERS
: Are there faults in #1 and #2 cylinders?
NOTE:
Check the following items.
Spark plugs
Fuel injectors
Ignition coil
If no abnormal is discovered, check for“D: IGNITION
CONTROL SYSTEM”of #1 and #2 cylinders side.
: Repair or replace faulty parts.
: Go to step10AI11.
216
2-7ON-BOARD DIAGNOSTICS II SYSTEM
10. Diagnostic Chart with Trouble Code for LHD Vehicles
Page 2068 of 3342
10AI7
GROUP OF #3 AND #4 CYLINDERS
: Are there faults in #3 and #4 cylinders?
NOTE:
Check the following items.
Spark plugs
Fuel injectors
Ignition coil
If no abnormal is discovered, check for“D: IGNITION
CONTROL SYSTEM”of #3 and #4 cylinders side.
: Repair or replace faulty parts.
: Go to step10AI11.
10AI8
GROUP OF #1 AND #3 CYLINDERS
: Are there faults in #1 and #3 cylinders?
NOTE:
Check the following items.
Spark plugs
Fuel injectors
Skipping timing belt teeth
: Repair or replace faulty parts.
: Go to step10AI11.
217
2-7ON-BOARD DIAGNOSTICS II SYSTEM
10. Diagnostic Chart with Trouble Code for LHD Vehicles
Page 2069 of 3342
10AI9
GROUP OF #2 AND #4 CYLINDERS
: Are there faults in #2 and #4 cylinders?
NOTE:
Check the following items.
Spark plugs
Fuel injectors
Skipping timing belt teeth
: Repair or replace faulty parts.
: Go to step10AI11.
10AI10
THE CYLINDER AT RANDOM
: Is the engine idle rough?
: Go to step10AI11.
: Go to DTC P0170.
B2M0759
10AI11
CHECK EGR SYSTEM.
: Is the minimum EGR system pressure value
(value of function mode (F42) less than 1
kPa?
NOTE:
Use the value read in step10X2for function mode F42.
: Clean EGR valve.
CAUTION:
Do not use solvent when cleaning EGR valve
assembly, as it can damage diaphragm.
NOTE:
Remove and blow away the exhaust deposits. Make
sure the valve operates smoothly and the valve seat area
is completely cleaned.
Replace EGR valve as required.
: Go to DTC P0170.
218
2-7ON-BOARD DIAGNOSTICS II SYSTEM
10. Diagnostic Chart with Trouble Code for LHD Vehicles